EXHIBIT 11.1 LANDSTAR SYSTEM, INC. AND SUBSIDIARY CALCULATION OF EARNINGS PER COMMON SHARE (In thousands, except per share amounts) (Unaudited) Thirteen Weeks Ended --------------------------- March 30, March 31, 2002 2001 ------------ ------------- Net income $ 8,514 $ 8,354 ============ ============ Average number of common shares outstanding 8,097 8,512 ============ ============ Earnings per common share $ 1.05 $ 0.98 ============ ============ 19